Biodiversity Profile of Phytotelmata of The Southern Western Ghats, and The Use of Tree Crab Kani maranjandu Kumar, Raj & Ng, 2017, as an Indicator of Ecosystem Health


  • Department of Aquatic Biology and Fisheries, University of Kerala, Thiruvananthapuram - 695581
  • Department of Aquatic Biology and Fisheries, University of Kerala, Thiruvananthapuram - 695581



Kani maranjandu, Phytotelmata, Agasthyamalai Biosphere Reserve, Bioindicator, Ecosystem management


Kani maranjandu Kumar, Raj & Ng, 2017 (Gecarcinucidae) is India’s first tree-climbing crab reported from the Agasthyamalai Biosphere Reserve (ABR), Southern Western Ghats. This unique arboreal species uses phytotelmata or water-filled tree holes as their habitat. The species has been reported from the phytotelmata of trees of evergreen and adjacent semi-evergreen forest covers across the ABR. Phytotelmata being an aquatic microcosm, serves as a discrete ecosystem. It harbours a diverse range of taxa, dominated by insect larvae, crustaceans and amphibians interacting with each other within this small ecosystem. The highly selective habitat requirements of Kani maranjandu eventually highlights their importance as indicator species, which can showcase the health and productivity of the forest ecosystem. The multifaceted role of Kani maranjandu as a key constituent of phytotelmic container habitat has been evaluated. The eligibility criteria for a bio-indicator have been assessed for this crab species and found fit as a biological indicator towards manifesting the productivity of the forest ecosystem. Kani maranjandu, as indicator species, can judge the quality of the container habitat and forest ecosystem, and changes happening over time. Any unusual environmental stress or impact influence subsequent changes in the biotic responses of the animal to look into ecosystem stability. Estimating the ecological stressors and devising the indicator species towards monitoring plans and management measures promotes successful conservation and appropriate management of the ecosystem’s biodiversity. The study further suggests conserving larger trees in degraded forests through eco-restoration efforts, besides considering this ubiquitous species as an indicator of ecosystem health.


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How to Cite

K. R., S., & A., B. K. (2023). Biodiversity Profile of Phytotelmata of The Southern Western Ghats, and The Use of Tree Crab <i>Kani maranjandu</i> Kumar, Raj & Ng, 2017, as an Indicator of Ecosystem Health. Records of the Zoological Survey of India, 123(2S), 613–624.


Anonymous. 1983. The natural moment. An unidentified pinching object. Natural History 92: 50-51.

Arya, S., Trivedi, J. N. and Vachhrajani, K. D. 2014. Brachyuran Crabs as A Biomonitoring tool: A conceptual Framework for Chemical Pollution Assessment. International Research Journal of Environmental Sciences, 3(1): 49-57.

Barboza, C. A. M., Mattos, G., Gomes, A. S., Zalmon, I R. and Costa, L. L. 2021. Low densities of the Ghost Crab Ocypode quadrata Related to Large Scale Human Modification of Sandy Shores. Frontiers in Mariner Sciences. 8:1-11.

Bartolini F., Penha-Lopes G., Limbu S., Paula J. and Cannicci S. 2009. Behavioral Responses of the mangrove fiddler crabs (Uca annulipes and U. inversa) to urban sewage loadings: Result of a mesocosm approach. Marine pollution bulletin, 58:1860- 1867.

Bayliss, J. 2002. The East Usambara tree-hole crab (Brachyura: Potamoidea: Potamonautidae)-a striking example of crustacean adaptation in closed canopy forest, Tanzania. African Journal of Ecology 40: 26-34.

Beltrame M.O., Marco S.G.D. and Marcovecchio J.E. 2011. The burrowing crab Neohelice granulata as potential bioindicator of heavy metals in estuarine systems of the Atlantic coast of Argentina. Environmental monitoring and assessment, 172: 379–389.

Blakely, T., J.Harding, J. S. and Didham,R. K. 2012. Distinctive aquatic assemblages in water-filled tree holes: a novel component of freshwater biodiversity in New Zealand temperate rainforests. Insect Conservation and Diversity 5: 202-212.

Cumberlidge, N. and Sachs, R. 1991. Ecology, distribution, and growth in Globonautes macropus (Rathbun, 1898), a treeliving fresh-water crab from the rain forests of Liberia (Parathelphusoidea, Gecarcinucidae). Crustaceana, 61: 55–68.

Cumberlige, N. Boyko, C. B. and Harvey, A. W. 2002. A new genus and species of freshwater crab (Decapoda, Crustacea, Potamoidea) from northern Madagascar, and a second new species associated with Pandanus leaf axils. Journal of Natural History, 36: 65-77.

Cumberlige, N. and Vannini. M. 2004. A new species of tree-hole living freshwater crab (Brachyura: Potamoidea: Potamonautidae) from coastal East Africa. Journal of Natural History 38: 681–693.

Cumberlidge, N., Fenolio, D. B., Walvoord, M. E. and Stout, J. 2005. Tree-Climbing Crabs (Potamonautidae and Sesarmidae) from Phytotelmic Microhabitats in Rainforest Canopy in Madagascar. Journal of Crustacean Biology, 25(2): 302-308.

Fenolio, D. B., Walvoord, M. E., Stout, J. F., Randrianirina, J. E. and Andreone, F. 2007.A new tree hole breeding, Anodonthyla (Chordata: Anura: Microhylidae: Cophylinae) from low-altitude rainforests of the Masoala Peninsula, northeastern Madagascar. Proceedings of the Biological Society of Washington, 120(1): 86-98.

Frank, J. H., & Lounibos, L. P. (Eds.). (1983). Phytotelmata: terrestrial plants as hosts for aquatic insect communities. Plexus Pub.

Giraldes, B. W., Coelho, P. A., Filho, P. A. C., Macedo, T. P. and Freire, A. S. 2021. The ghostr of the past anthropogenic impact: Reef-decapods as bioindicators of threatened marine ecosystems. Ecological Indicators, 113:108465.

Greeney, H. F. 2001. The insects of plant-held waters: a review and bibliography. Journal of Tropical Ecology. 17: 241-260.

Grinang, J., Min, P. Y., Ng, P. K. L. 2015. A new species of tree-holes dwelling freshwater crab of the genus Arachnothelphusa Ng, 1991 (Crutacea: Decapoda: Brachyura: Gecarcinucidae) from northern Sarawak, Malaysia, Borneo. Raffles Bulletin of Zoology 63:454-460.

Harwell, M. A., Gentile, J. H., McKinney, L. D., Tunnel, J. W., Dennison, W. C., Kelsey, R. H., Stanzel, K. M., Stunz, G. W., Wither, K. and Tunnell, J. 2019. Conceptual Framework for Assessing Ecosystem Health. Integrated Environmental Assessment and Management, 15: 544-564.

Holt, A. E. & Miller, S. W. (2011) Bioindicators: Using Organisms to Measure Environmental Impact. Nature Education Knowledge, 2.2: 1-8.

Jocque, M., Fiers, F., Romero, M. and Martens, K. 2013. Crustacea in Phytotelmata: A Global Overview. Journal of Crutacean Biology, 33(4): 451-460.

Kitching, R. L. 2000. Food Webs and Container Habitats: the Natural History and Ecology of Phytotelmata. Cambridge Univ. Press, Cambridge.

Kumar, A. B., Raj, S., Ng, P. K. L. 2017. Description of a new genus and new species of a fully arboreal crab (Decapoda: Brachyura: Gecarcinucidae) from the Western Ghats, India, with notes on the ecology of arboreal crabs. Journal of Crustacean Biology, 37(2):157-167.

Lehtinen, R. M., Lannoo, M. J. and Wassersug, R. J. 2004. Phytotelm-Breeding Anurans: Past, Present and Future Research. Miscellaneous Publications, Museum of Zoology. University of Michigan, 193:1-9.

Lezcano, A. H., Quiroga, M. L. R., Liberoff, A. L. and Molen, S. V. Marine pollution effects on the southern surf crab Ovalipes trimaculatus (Crutacea: Brachyura: Polybiidae) in Patagonia Argentina. Marine Pollution Bulletin, 91(2): 524-529.

Majumder, J., Goswami, R., and Agarwala, B. K. 2011. A Preliminary study on the insect community of Phytotelmata: an ephemeral ecosystem in Tripura, Northeast India. NeBio, 2(3): 27-31.

Massou, V. M. N., Din, N., Kenne, M. and Dongmo, B. 20.18. Brachyuran crab diversity and abundance patterns in the mangroves of Cameroon. Regional Studies in Marinje Science, 24: 324-335.

Mekong River Commission. 2006. Identification of Freshwater Invertebrates of the Mekong River and Its Tributaries. Mekong River Commission. University of Minnesota.

McGeoch M., A. , Sithole, H. , Samways, M. J. , Simaika, J. P. , Pryke, J. S. , Picker, M., Uys, C. , Armstrong, A. J. , Dippenaar- Schoeman, A. S., Engelbrecht, I. A. , Braschler, B., Hamer, M. 2011. Conservation and monitoring of invertebrates in terrestrial protected areas. Koedoe 53:1–13.

Mogi, M. 2004. Phytotelmata: hidden freshwater habitats supporting unique faunas. Freshwater invertebrates of the Malaysian Region. 13-22.

Nagpal, B. N., Sharma, V. P. 1985. Tree hole breeding and resting of mosquitoes in Orissa. Indian Journal of Malariology 22: 115-117. Ng, P. K. L. 1991a. On two species of Archipelothelphusa Bott, 1969 (Crustacea: Decapoda: Brachyura: Sundathelphusidae) from Luzon, Philippines, one of which is new.—Zoologische Mededelingen, Leiden, Netherlands 65: 13–24.

Ng, P. K. L. 1991b. Bornean freshwater crabs of the genus Arachnothelphusa gen. nov. (Crustacea: Decapoda: Brachyura: Gecarcinucidae). Zoologische Mededelingen, Leiden, Netherlands 65: 1–12.

Ng, P. K. L. 1995. Ceylonthelphusa scansor, a new species of tree-climbing crab from Sinharaja Forest in Sri Lanka (Crustacea: Decapoda: Brachyura: Parathelphusidae). Journal of South Asian Natural History 1: 175–184.

Nishadh, K. A. and Das, K. S. A. 2012. Metazoan community composition in tree hole aquatic habitats of Silent Valley National Park and New Amarambalam Reserve Forest of the Western Ghats, India. Journal of Threatened Taxa, 4(14): 3312-3318.

Nishadh, K. A. R. and Das, K. S. A. 2014. Tree-Hole Aquatic Habitats: Inhabitants, Processes and Experiments. A Review. International Journal of Conservation Science, 5(2): 253-268.

Rao, T. R., Pannicker, K. N., Reuben, R. 1970. Tree-Hole breeding of Aedes aegypti in southern India: a preliminary report. Bulletin of World Health Organization 42(2): 333–334.

Rowley, J. J. L., Le, D. D. T., Dau, V. Q., Hoang, H. D. and Cao, T. T. 2014. A Striking new Species of Phytotelm-breeding tree frog (Anura: Rhacophoridae) from Central Vietnam. Zootaxa 3785 (1): 25-37.

Samways, M. J., McGeoch, M. A., New, T. R. 2010. Insect conservation: a handbook of approaches and methods. Oxford University Press, Oxford.

Selvan, P. S., Jebanesan, A., Reetha, D. 2016. Entomofaunal diversity of tree hole mosquitoes in Western and Eastern Ghats hill ranges of Tamilnadu, India. ActaTropica, 159: 69-82.

Simonetti, P., Botte, S. E., Fiori, S. M. and Marcovecchio, J. E. 2013. Burrowing Crab (Neohelice granulkata) as a Potential Bioindicator of Heavy Metals in the Bahia Blanca Estuary, Argentina. Archives of Environmental Contamination and Toxicology, 64: 110-118.

Subramanian, K. A. and Sivaramakrishnan, K. G. 2007. Aquatic Insects for biomonitoring freshwater ecosystems- A methodology Manual. Ashoka Trust for Ecology and Environment (ATREE), Bangalore, India.1-31.

Thienemann, A. 1954. Chironomous. Leben, Verbreitung und wirtschaftliche Bedeutung der Chironomiden. Binnengawasser 20.

Varga, L. 1928. Eininteressanter Biotop des Bioconose von Wasserorganismen. BiologischesZentralblatt 48:143-162.

Wong M. C., Wright L. D. and Barbeau, M. A. 2006. Sediment selection by juvenile sea scallops (Placopecten magellanicus (Gmelin)), sea stars (Asterias vulgaris verrill) and rock crabs (Cancer irroratus say). Journal of shellfish, 25: 813-821.

Wehrtman, I. S., Magalhaes, C. and Gonzalez, O. C. B. 2016. First Confirmed Report of a primary Freshwater Crab (Brachyura: Pseudothelphusaidae) Associated With Bromelid in the Neotrapics. Journal of Crustacean Biology, 3693: 303-309.

Williams, D. D. 2006. The Biology of Temporary Waters. Oxford University Press, Oxford.

Wittman, P. K. 2000. The Animal Community Associated with Canopy Bromeliads of the Lowland Peruvian Amazon Rain Forest. Selbyana, 21(1.2): 48-51.

Wolcott, D. L., Nancy, J. O’Connor. 1992. Herbivory in Crabs: Adaptations and Ecological Considerations, American Zoologist, 32 (3): 370–381.

Yanoviak, S. P. 1999. Community structure in water-filled tree holes of Panama: effects of hole height and size. Selbyana 20: 106–115 pp.

Yanoviak, S. R and Fincke, O. M. 2005. Sampling methods for water filled tree holes and their artificial analogues. In: Insect sampling in Forest Ecosystems.168-185. (Published by Simon R. Leather, BlackWell Science Ltd, Australia.